Panelized suspended basic furnace roof

ABSTRACT

An air-cooled and grout sealed-off refractory furnace roof is provided in the form of assembled panels having aligned rows of tile members that are handled as pallet groups to facilitate storage, shipping and furnace mounting. The panels are carried in a suspended relation from overhead metal structure by a vertical to horizontal extending assembly of metal hangers that include vertically supported cross-extending horizontal arms or yokes having secondary hanger members at each of their ends that are in the form of U-shaped members that are provided with spaced-apart latching slot portions along their opposed walls for detachably suspending tile-carrying hanger castings therefrom. A bottom closing member is associated with each U-shaped member which is mounted in such a manner as to lock the hanger castings in position within the latching slot portions. Diagonally or crossextending locking pins or rods are employed for tying the tile members of the rows together and for locking the hanger castings in position with respect to the tile members being suspended thereby. Filling material is used for sealing-off the joints between panels of tile members and over the upper surface of the roof assembly. This facilitates a circulatory movement of cooling and dust removing air along the upper reaches of the assembled tile members.

[ June 10, 1975 United States Patent [191 Longenecker 1 PANELIZEDSUSPENDED BASIC FURNACE ROOF [76] Inventor: Levi S. Longenecker, 61Mayfair Dre, Pittsburgh, Pa. 15228 [22] Filed: Apr. 26, 1974 211 App].No.: 464,568

Related U.S. Application Data Primary Examiner-John J. Camby Attorney,Agent, or Firm-Parmelee, Miller, Welsh & Kratz ABSTRACT An air-cooledand grout sealed-off refractory furnace roof is provided in the form ofassembled panels having aligned rows of tile members that are handled aspallet groups to facilitate storage, shipping and furnace mounting. Thepanels are carried in a suspended relation from overhead metal structureby a vertical to horizontal extending assembly of metal hangers thatinclude vertically supported cross-extending horizontal arms or yokeshaving secondary hanger members at each of their ends that are in theform of U-shaped members that are provided with spaced-apart latchingslot portions along their opposed walls for detachably suspendingtile-carrying hanger castings therefrom. A bottom closing member isassociated with each U- shaped member which is mounted in such a manneras to lock the hanger castings in position within the latching slotportions. Diagonally or cross-extending locking pins or rods areemployed for tying the tile members of the rows together and for lockingthe hanger castings in position with respect to the tile members beingsuspended thereby. Filling material is used for sealing-off the jointsbetween panels of tile members and over the upper surface of the roofassembly. This facilitates a circulatory movement of cooling and dustremoving air along the upper reaches of the assembled tile members.

24 Claims, 26 Drawing Figures 33b 34 ,33ct 33 l 35 37 r a? 38 as as To36 38 2o 40 PATENTEDJUN 10 I975 SHEET Fig. 2B

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fFlllllllJlIll] PANELIZED SUSPENDED BASIC FURNACE ROOF This applicationis a continuation in part of my copending application Ser. No. 385.083,entitled Panelized Suspended Furnace Roof and Improved Feed Hole, filedAug. 2, I973. now U.S. Pat. No. 3.825.409.

BACKGROUND OF THE INVENTION l. Field of the Invention This inventionpertains to an improved suspended roof and one in which isolation of themetalwork is enhanced and that employs an improved panelized detachablesuspension of refractory tile members. A phase of the invention relatesto the sealing-off and crossintegrating of refractory tile members usedin the construction.

2. Description of the Prior Art In my US Pat. No. 3,789,780 I haveillustrated how a panelized assembly of tile members may be utilized inmounting them in a suspended relation from a crossextending support beammember, and have additionally illustrated the employment of a singlerelatively short-length horizontally extending foot member that iscarried by the lower end of a gooseneck hanger to, in turn, carry a pairof rows of hanger castings therealong which directly suspend tilemembers therefrom.

There has been a continued need for further simplication in the handlingof tile members and their utilization in the form of panels and, at thesame time, for enabling an improved suspending of fully supported tilemembers from each gooseneck hanger in such a manner as to maximize thestrength of the rows therealong and provide a better integration of thetile members of each panel. Further. there is a need for a sealed typeof roof construction that will facilitate efficient, continuous movementof cooling and dirt picking up air over its upper reaches and that, asconstructed, will provide compressible expansion joints between tilemember panels. The present invention also deals with providing animproved structure for a high temperature melting furnace that will beleakproof, will provide a good degree of insulation against heat loss,and that is flexible in its installation.

SUMMARY OF THE INVENTION It has thus been an object of the presentinvention to develop a suspended roof construction which not onlyminimizes the expense of installation, but provides maximum flexibilityof installation, operation and repair.

Another object has been to further facilitate the panelizing ofrefractory tile members for handling, stor age and shipping purposes.

Another object of the invention has been to provide practical means ofinterlocking tile members of panelized rows together. as well as forlocking hanger castings in a latched tile-supporting relation.

A further object has been to enable a balanced maximization of thenumber of tile rows that may be suspended from each overhead post,gooseneck or tertiary hanger member.

A still further object has been to provide a mounting of refractory tilemembers that will facilitate making a roof leakproof and with a gooddegree of insulation against heat loss.

These and other objects will appear to those skilled in the art from theillustrated embodiment and the claims.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is a fragmental side view inelevation of a portion of a furnace roof constructed in accordance withthe invention, and utilizing a horizontally positioned box-like orinverted U-shaped, plate-like member along each end portion of acentrally hanger-supported, short-length, cross-extending, yoke member;

FIG. 2 is a fragmental end view in elevation of the structure of FIG. I,taken at right angles thereto. The tile members are shown assembled in aseries of rows that are given alphabetical numbering to characterize theassembled relation of a panelized assembly, such as illustrated in FIGS.10, 11, I2, and 13;

FIGS. 2A and 2B are enlarged horizontal sections taken respectivelyalong the lines llA-IIA and Il- BIIB of FIG. 2',

FIG. 3 is a top plan view on the same scale as FIGS. 1 and 2 showing aunitized panel assembly of refractory tile members, and for claritymembers of the overhead framework are omitted. It primarily illustratesthe use of a yoke-like arm member and its endwise-positioned,horizontally extending pair of hanger supporting members;

FIG. 4 is an enlarged side view in elevation of a primary hanger orhanger casting for carrying a row of tile members in a wide faceabutting suspended relation;

FIG. 5 is an end view in elevation on the same scale as FIG. 4 furtherillustrating the hanger casting;

FIG. 6 is a top plan view and FIG. 7 is a bottom plan view of the hangeron the scale of FIGS. 4 and 5',

FIGv 8 is an enlarged fragmental end section taken along the lineVIII-VIII of FIG. 4;

FIG. 9 is a side perspective view in elevation on the scale of FIGS. 4to 8, inclusive, showing the construction of a refractory tile memberemploying the invention and as adapted to receive a pair of latching legand foot parts of an associated primary hanger casting in a manner suchas illustrated in FIGS. I7 to 19, inclusive:

FIG. 10 is a greatly reduced side view in elevation showing a palletizedassembly of refractory tile members from their narrow side faces that isbanded both horizontally and vertically;

FIG. 11 is a fragmental top plan view on the scale 01 FIG. 10 and of thesame panel;

FIG. 12 is a side view in elevation on the scale of an: similar to FIG.10, but illustrating a further type of pal letizing in which hangercastings are assembled with the panel thus necessitating the eliminationof the vertica banding members;

FIG. 13 represents an end view in elevation on th scale of FIG. 12 andshowing the same palletized as sembly of tile members from their wideside faces witl hanger castings in position. In this figure, the type 0assembly of tile members will apply equally to the con struction of FIG.10, but with the deletion of the hange' castings and the addition ofvertical strap members il lustrated in FIG. 10;

FIG. 14 is a side perspective view in elevation of: plate-like bottomclosure member having upturned Sldl flanges of channel shape that serveto close-off tht member of FIG. 15 and to additionally enable a lockinof hanger castings in position within the latter membe as illustrated inFIG. 16;

FIG. I5 is a view similar to and on the same scale as FIG. 14 butillustrating the construction of a box-like, inverted U-shaped orchannel-shaped secondary hanger or supporting member for suspending arow of hanger castings along each of its pair of opposed side or flangewalls in a latched relation with respect thereto as particularlyillustrated in FIG. I6,

FIG. 16 is a fragmental side section in elevation on an enlarged scalewith respect to FIGS. I4 and I5, and showing an assembly of supportingmembers including those illustrated in FIGS. 14 and I5;

FIGS. 17 and 18 are enlarged fragmental end views in elevation on thescale of FIG. 9, illustrating rotational mounting of a primary hanger orhanger casting within an aligned row of wide side faces abutting tilemembers while, for example, they are being retained in an assembledrelation as a panel on a pallet, such as illustrated in FIGS. 12 and 13;

FIG. I9 is a fragmental end view in elevation on the same scale as FIGS.17 and 18 and taken at right angles thereto showing the parts in thesame position as illustrated in FIG. 18:

FIG. 20 is a fragmental end section in elevation on the scale of FIGS,17 and 19 illustrating the use of insu' lating blocks, filling mortar,joint sealing, and an overhead or top extending layer of grouting;

FIG. 21 is a reduced end view in elevation of a panel assembly of a typeillustrated generally in FIG. 13, but on a large scale with respectthereto. This view particularly illustrates a complete panelizedassembly which has been enclosed by a skirt of china clay or hydratedaluminum silicate, and with its upper surface coated with a layer ofabout one-eighth or one-fourth inch of grout. The tiles of each row areshown integrated or locked together by the utilization ofthrough-extending latching hole portions and cooperating latching pinsor rods;

FIG. 22 is a fragmental side view in elevation on the scale of FIGS. 1to 3 illustrating the use of metal sealing buckets or bowl-like elementsto provide an enclosed air circulation area about the upper reaches ofan assembled roof of refractory tile members;

FIG. 23 is a greatly reduced transverse end view in elevationillustrating a complete air circulation system for a roof constructed inaccordance with the invention;

And, FIG. 24 is a fragmental side view on the same scale and of the samesystem as shown in FIG. 23.

DESCRIPTION OF THE PREFERRED EMBODIMENT As shown particularly in FIGS. 1and 2 of the drawings, the suspended furnace roof of the invention maybe carried or mounted on transversely extending and spaced-apart mainsupport girders of an overhead metal framework through the agency ofrelatively short-length, overhead support beams 11 that extendlongitudinally of the furnace and that removably rest on the girders 10for maneuvering into and out of a right-angular, fully mountedpositioning thereon. Short length I-beam pieces 12 serve as risers forthe beam members I] and rest upon the lower flange of the girders l0.Panels of refractory tile members 22 are carried by tertiary hangers 30of a gooseneck or post hanger type that are suspended from anassociated, longitudinally extending, beam member I] through the agencyof an upper, hook-nose shaped latch part 3] thereof.

The latch part 31, as particularly shown in FIG. 2A, may be a castingprovided with a backwardlyextending. T-shaped portion 31b that isadapted to fit in the spacing between opposed flange leg portions of apair of vertically extending angle pieces or members that provide thetertiary hanger 30. As also shown. the latch part 31 has an eyelet orcross-extending open por' tion 31a to receive the book of an overheadhoist or crane. Bolt and nut assemblies 32 are employed for se curingthe part 31 in position between the two angle pieces of the hanger toproject horizontally backwardly therefrom. As shown particularly inFIGS. 1 and 2, the hook-nose part 31 is adapted to rest upon and latchover an upper flange of an associated support beam member I].

The lower end of the tertiary hanger 30 is shown provided with aconnector casting 33 which, as particularly illustrated in FIG. 2B, hasa horizontal bottom flange or foot 33a that is weld-secured in acentrally balanced position, as shown in FIG. 3, to the web of ahorizontally cross-extending, I-beam shaped, short-length arm or yokemember 35. The connector casting 33 also has a fowardly projectingT-shaped mounting portion 33b whose web extends between the pair ofangle pieces that provide the hanger 30, and its flange is adapted toabut against flange feet of the channel members (see FIG. 28). Eachbottom connector casting 33 is secured to the body of the hanger 30 bybolt and nut assemblies 34 and has a pair of vertically extendingtriangular shaped reinforcing side wings 33c that project up wardly fromits bottom flange or foot 33a.

The short length yoke or arm member 35 extends with its web portion on ahorizontal plane from opposite sides of the bottom connector 33 (seeFIG. 2) and, at or adjacent its opposite ends, carries a pair of hangersupporting members 38 in a horizontally positioned and spaced-apartrelation with respect to each other, through the agency of pairs (seeFIGS. I, 2 and 3) of angle-shaped connector ears or wings 36. It will benoted (see FIG. 3) that each wing pair 36 projects from a side flange ofthe member 35 in a directly opposed relation with another pair 36 at thesame end portion of the member 35 to receive and carry an upwardlyprojecting leg or web portion of a horizontally extending, invertedT-shaped, hanger-supporting, structural mem' ber 38. Each support member38 is removably carried by a pair of the wings 36 by means of a cotterpin assembly 37. As illustrated particularly in FIG. 2, the in vertedTshaped structural members 38 are of a relatively short length,corresponding substantially to the length extent of a panel ofrefractory tile members 22 across what may be termed their maximum widthdi mension, as represented by an aligned row of narrow face abuttingtile members. See tile members A, B, C. D, D, C, B and A of FIGS. 2 and3.

Secondary hanger members 40 are provided of platelike construction thathave an inverted-U or box-like shape. As illustrated particularly inFIGS. 1 and 2, the secondary hangers 40 are of the same length as anassociated support member 38, and each is suspended from an associatedsupport member 38 by welding its upper connecting wall or web portion tothe underside of the foot or flange portion thereof. The spaced-apartflange or side walls of each hanger 40 are in an opposed verti callyextending, space-apart relation with respect to each other, and areprovided with (see particularly FIG. 15) latching slot portions 40b ofhorizontally elongated, rectangular shape. The open bottom side of eachmember 40 is closed-off by an associated bottom closure member 41, alsoof platelike construction. The closure member 41 is of channel shape,having upwardly extending, opposed side flanges that are adapted, asshown in FIG. 16, to slidably interfit be tween the side flanges or wallportions of an associated hanger member 40 and to be secured in positionthrough the agency of bolt and nut assemblies 42. The assemblies 42extend through aligned hole portions 40a in the member 40 and 41a in themember 41. The members 40 and 41 thus form a complete rectangularbox-like hanger assembly. At the same time, the member 41 serves to lockan upper latching or hook end portion 46 of a primary hanger or hangercasting 45 in position within an associated latching slot portion 40b.As will be apparent, the members 38 and 40 serve as a supporting memberconstruction for primary hangers 45. Each member 40, as shown in FIG.16, is adapted to suspend a pair of spaced-apart aligned rows of hangers45 therefrom.

The construction of primary hangers or hanger castings 45 isparticularly illustrated in FIGS. 4 to 8, inclusive. Each hanger 45 hasa centrally disposed, upwardly extending, hook or latching end portion46, a longitudinally extending, connecting shoulder 47, and a pair ofend legs 48 of half section and intermediate full section legs 50, ascarried and projecting downwardly in a spaced relation from and alongthe shoulder 47, The legs 48 terminate in what may be termed end or halffeet 49 and a tapered bottom portion 49a. In a like manner, the fullsection leg members 50 terminate in a full width, cross-extending foot51, each half of which has a tapered bottom portion 51a that defines arounded, cross-extending recess 5 lb which serves an as open guide slotfor bypassing a latching pin or rod 52, such as shown in FIGS. 18 and19.

The construction of the refractory tile or block members 22 isparticularly illustrated in FIG. 9. Each tile member is shown as havinga pair of opposed, vertical, wide side faces 22a and 22b and a pair ofopposed, vertical, narrow side faces 22c and 22d as surmounted by anupper face 22e. Each tile member 22 has a recessed ledge portion 23 thatlies on a horizontal plane parallel to the upper face 22e and isdownwardly offset with respect thereto, The portion 23 serves as anentry recess for a latching leg and foot portion of a hanger casting 45as introduced from front, narrow side face 22c and its cross-extendingsloped or beveled, lip entry portion 23a. A vertical riser portion 23bextends in a planar re lation at right angles from the back end of theledge portion 23 to terminate at the top face 226.

A transversely elongated, latching slot portion 24 is provided on eachwide side face 220 and 22b being open thereto and also open to the ledgeportion 23 and to an upwardly extending, legreceiving slot portion 25.As shown in FIG. 9, there is a latching slot portion along each wideside face that is open to an associated latching portion 24, to thefront ledge portion 23b and to the upper face 22. A backwardly decliningledge 240 (see FIG. 17) that extends from the riser portion 23b andabove the latching slot portion 24 serves to guide the entry of the footportion of a hanger casting into the latching slot portion.

FIGS. 17 and 18 illustrate how the foot and leg portions of a hangercasting 45 are rotated into position within a latching slot portion 24for suspending tile member 22, as illustrated in FIGS. 18 and 19. Eachtile member 22a is also shown provided with a pair of sidepositioned,backwardly declining or sloped, offset. entry portions 26 forfacilitating bypassing of an enter ing foot portion, such as 49 of ahanger casting 45. See the dot and dash line position of FIG. 17.

FIGS. 17, 18, 19 and 21 illustrate the provision and use of so-calledlatching hole portions that project or incline diagonally betweenadjacent tile member 22 of a row of tile members taken along theiraligned and abutting narrow side faces. Basically, for integrating sucha line or row of tile members 22 in a connected relation with respect toeach other, a latching hole portion 27 may extend from at least one andpreferably from both its latching slot portions 24. The hole portion 27,as particularly shown in FIGS. 18 and 19, may extend along one side face220 of one tile member 22 as a half hole portion to, with a half a holeportion of an aligned wide face 221) of an abutting tile member 22,define a split latching hole portion along which a lock ing pin or rod,such as 52, may be inserted. The rod 52 may be inserted after the hangercasting 45 has been rotated first into a latching, fully verticallyextending position (shown in FIGS. 18 and 19). An upper head orangle-shaped end portion 52a of the rod may engage a foot portion, suchas 4) or 51 of a hanger casting, to hold its latching position. The pinor rod 52 also extends from the back narrow side face 22d of the onetile member 22 into an extension hole portion 270 that projects from thenarrow front side face 22c of an adjacent tile member 22. That is, thehole portion 270 projects from the front narrow side face 22c of thenext backwardly positioned tile member 22 and is endwisealigned with theopen portion 27 of the forwardly positioned one tile member 22 to, withthe pin or rod 52, thus integrate the two tile members with respect toeach other.

Locking pins or rods 53 without head or turned-over end portions mayalso be used as shown in FIG. 21. They do not extend from a latchingslot portion 24, but merely extend diagonally, either as a full sizehole por tion from one narrow side face of a tile member into anddiagonally within and along the body of or as half size hole portionsalong a wide side face of one or more corresponding tile members thathave endwise-aligned hole portions. In this connection, see the holeportions 27b, 27c and 27d of FIG. 21. Also, as shown in this FIG- URE,the latching hole portions 27 that start at a latching slot portion 24of one tile member may extend into and through a plurality or group oftile members, see 27e.

FIGS. 20 and 21 also illustrate how panel assemblies may be formed assealed-off units to provide a leakproof furnace roof. As shownparticularly in FIG. 20, mortar 55 may be used for filling the latchingslot portions 24 about the feet 49 and 51 of the hanger castings 45, anda layer may be extended along the recessed ledge portion 23 and to fillthe spacing left by the front beveled portion 23a. A filling insulatingblock or pad 56, such as of asbestos material, may then be placed tofill up the recess ledge portion 23 with its top level with the upperface 22e. At this time as shown in FIG. 21, the panel or assembly oftile members may be held together by a horizontal steel or metal band 28which may be left in place while encircling the blocks with aninsulating board-like skirt or enclosure 58. The skirt 58 may be ofasuitable somewhat flexible insulating material, such as a commercialKaolin type of china-clay or hydrated aluminum silicate material havinga high melting point.

After the skirt 28 has been pasted or otherwise se cured in positionabout the banded, panelized group of tile members, then a top sealingsurface is applied using a clay grout that is thin enough to penetratethe tile or brick joints and to a depth to form an upper coating 57 ofabout one-fourth to one-eighth of an inch in thickness. The tile membersof a panel thus sealed provides a leakproof assembly and as nestedtogether with other panels to form a suspended roof. The skirt 58 of thepanels will positively seal their joints and provide for expansion andcontraction. The roof may be used for a high temperature melting furnacedue to its leakproof construction and the fact that a good degree ofinsulation against heat loss is attained. The skirt 58 may be of asuitable thickness for attaining a desired amount of expansion; athickness of about three-eighths to onehalf of an inch has been found toordinarily be sufficient. The skirt 58 also provides a side support forthe grout coating 57.

The insulating blocks 56 not only fill the latching slots or notches 24,but also to help reduce heat loss, and since they are of short extentfrom the standpoint of the overall depth of each tile member 22, anexcessive or harmful temperature build-up is avoided with reference tothe hanger castings 45. Since the tile tops are in effect uncovered,both such tops and the legs of the hanger castings provide surfaceexposure for requisite effective cooling. The construction eliminatesthe need for punched metal plates for protecting sides of individualtile members, provides a leakproof construction. It makes possible thepractical utilization of 12 inch tile members without plates in a hightemperature furnace that is economical and of light weight, and thatenables a highly satisfactory control of heat loss. It eliminatesconventional steel plates that are used with chemically bonded brick andwhich entail a much greater heat loss.

With reference to FIGS. 10, ll, 12 and 13, tile mem' bers 22 may beassembled at the brick or tile factory in a group or assembly consistingof tile rows extending at right angles with respect to each other, withone type of row alignment represented by tile members thereof in anabutting wide face to wide face aligned relation, such that hangercastings may be rotated into a latching position within their latchingslot portions from their front narrow side faces. Each hanger castingmay thus be rotated simultaneously into a latching position within agroup of tile members of the row. The other type of row alignmentinvolves tile members in a narrow face to narrow face aligned relation.Tile members of the row may be integralized by the employment of alignedlatching hole portions and associated latching locking pins or rods.

A panelized assembly of tile members 22 may be formed on a planar flooror platform 21 of a pallet 20, and may correspond in size to that of asuitable shipping and storing pallet, such as 3 feet by 4 feet. As shownin FIG. 10, the tile members 22 may then be secured as a panel assemblyon the pallet 20 through the agency of a peripherally extending,horizontal, steel banding strip 28 and one or more vertical steelbanding strips 29. Although it is preferable to, at the factory, merelypanelize and assemble the tile or brick members for storage and shipmentand subsequent furnace roof mounting. it has also been tound possible toinsert the hanger castings 45 in a latched position within the assemblybefore shipment. In such an event, care has to be taken to avoidstriking the projecting hook portions of the hangers to avoid damagingthe refractory tile. In any event, whether at the tile factory or at thefurnace site, the hanger castings 45 are inserted by rotating them intoposition within the latching slot portions 24 of cooperating tilemembers 22 while such members are still in a panelized assembly, andheld in such an assembly by a horizontal banding member 28 in a mannersuch as illustrated in FIGS. 12 and I3. Thereafter, the skirt 58 (seeFIG. 21) may be applied. It is preferable to add the mortar 55, blocks56 and grouting 57 after the panels have been installed in the roof andtheir sup porting pallets 20 removed. FIGS. 10 and I] of my pre viouslymentioned US. Pat. No. 3,789,780 show how individual panels may be movedinto position by an overhead crane or hoist and then suspended from anassociated support beam 11 by a primary or post hanger such as 30.

With reference to FIGS. 22, 23 and 24, a system for cooling themetalwork and cleaning the upper reaches of the refractory roofconstruction is shown. A fresh air blower 60 supplies cooling air underpositive pressure through an overhead manifold 61 and U-shapedhorizontalwertical pipe assembly 62, 63 in a lengthwise extendingrelation with respect to the furnace and as supported by the girders 10.FIG. 23 shows two vertical positive pressure flow air feed pipes 63 forsupplying cooling air downwardly, as indicated by the arrows, into asubstantially closed-off area immediately above the upper ends of therefractory tile members 22. The cooling air flows over and along theupper ends of the tile, and after picking-up dirt or dust is removed asa warmed, contaminated suction flow through vertically extending airpick-up or collector pipes 64 which extend transversely of the furnace.The return flow of air is then introduced into an overhead aircollecting duct 65 which discharges into an overhead manifold 66 thatextends parallel to the beam members 1], at right angles to the mainsupport girders l0 and thus, at right angles to the input portion of theair system. The warmed, dirty air is drawn from the overhead manifold 66by a suction blower 67 into a dust recovery unit 68 (shown in FIG. 24).The cleaned air may then be cooled and introduced into the manifold 61and along the upper reaches of the furnace tile for repeating the cycle,or may be introduced into the furnace to support combustion therein.

As shown particularly in FIG. 22, downwardly concavely shaped. dish orbucketlike, flanged metal bowl members 70 are adapted to rest on thebottom flanges of the T-bars or members 38 to close-off the spacingimmediately above the upper reaches of the tile members 27 incooperation with the box member assemblies 40, 41 and other closuremembers. In FIG. 24, the air collecting manifold 66 is shown hung belowthe cross girders 10 adjacent the furnace feed holes, and the pick-upducts 64 are shown located under the cross girders 10. It has beendetermined that effective air cooling employing a sealed roofconstruction will at least double the life of a suspended roof. Thetight sealing effected by the use of cover plates eliminates dirty roofproblems that tend to cause burning out of castings. The use of a rotarytype of furnace door, such as set forth and claimed in my co-pendingapplication Ser.

No. 385,083. will provide a furnace roof that is substantially fullyleakproof. The flow of cooling air within upper area isolating coverplates enables the collection and elimination of air contaminants. suchas sulphur, improves the life of the furnace roof. and enables the useof the warmed air for furnace combustion pur poses.

I claim:

1. ln an improved panelized suspended furnace roof construction formounting on an overhead metal framework having spaced-apartsubstantially horizontally extending support members, downwardlyextending post hanger members detachably suspended along the supportmembers, a cross-extending yoke member carried by a lower end portion ofeach of said post hanger members, a pair of hanger supporting memberssuspended in a horizontally extending and spaced-apart relation withrespect to each other from adjacent opposite ends of each of said yokemembers, row pairs of tile-supporting hangers removably carried by saidsupporting members, and each of said hanger supporting members extendingtransversely with respect to its as sociated said yoke member and havinga pair of spacedapart latching portions therealong each of which isadapted to carry a row of said row pairs of tilesupporting hangers.

2. A furnace roof as defined in claim 1 wherein, each of said hangersupporting members comprises a box like member whose latching portionsare latching slot portions along its opposite side walls, and said rowpairs of tile-supporting hangers are adapted to engage within saidlatching slot portions.

3. A furnace roof as defined in claim 2 wherein, a group of cooperatingtile members is suspended by said hangers in tile rows along oppositeside walls of each of said box-like members.

4. A furnace roof as defined in claim 1 wherein, structural members aresecured to extend in a substantially right-angular relation from each ofthe opposite ends of each of said yoke members, and each of said hangersupporting members is secured to extend downwardly from an associatedone of said structural members.

5. A furnace roof as defined in claim 4 wherein, each of said hangersupporting members is a channel-shaped member having its opposed sidewalls extending downwardly and having its connecting back wall securedto the associated one of said structural members.

6. A furnace roof as defined in claim 4 wherein, each of said structuralmembers is an inverted T-shaped member having its leg suspended from anadjacent end portion of the associated said yoke member and having itsbottom flange secured to carry an associated said hanger supportingmember.

7. A furnace roof as defined in claim 5 wherein, each saidchannel-shaped member has latching slot portions in a spaced-apartrelation along its opposed side flanges for receiving saidtile-supporting hangers as row pairs therealong.

8. A furnace roof as defined in claim 4 wherein, each member of saidpair of structural members is of inverted T-shape, and means is providedfor detachably suspending said T-shaped members adjacent opposite endsof each of said yoke members.

9. A furnace roof as defined in claim 8 wherein, said detachablesuspending means is a pair of wings carried by each end portion of eachof said yoke members, and

a pin extends through each said pair of wings for mounting the leg of anassociated one of said pair of T- shaped members therebetween.

10. A furnace roof as defined in claim 8 wherein, said pair of hangersupporting members includes a pair of members of inverted U-shape, eachhaving its connecting upper wall secured to the bottom flange of anassociated one of said T-shaped members, and each having latching slotportions along at least one of its pair of spaced-apart vertical sidewalls to receive and carry a row of said tile-supporting hangerstherealong.

11. A furnace roof as defined in claim 7 wherein, a group of tile memberrows is carried by said tilesupporting hangers along the opposed sideflanges of each of said channel-shaped members, and the tile members ofeach row are in a wide face abutting relation with respect to tilemembers of adjacent rows,

12. An improved furnace roof as defined in claim 7 wherein, a bottomclosure member is provided for each of said channel-shaped members thatis adapated to slidably interfit with the opposed side walls thereof,and means for securing said bottom closure member in position on itsassociated said channel-shaped member.

13. An improved furnace roof as defined in claim 12 wherein, each saidbottom closure member has side portions cooperating with said latchingslot portions for retaining said tile-supporting hangers in a latchedposition within said slot portions.

14. An improved furnace roof as defined in claim 7 wherein, a pair ofspaced-apart wing-shaped members are secured to project downwardlyadjacent opposite ends of each of said yoke members, an inverted T-shaped member has its leg removably secured between an associated pairof said yokes, and each of said channel shaped members has its connectedweb secured to the underside of an associated said T'shaped member.

15. An improved furnace roof construction as defined in claim 1 wherein,each of said hanger supporting members is of open-bottom box-like shapeand has latching slot portions along its opposite side walls todetachably receive said tile-supporting hangers therein, and a closuremember is adapted to interfit with each of said box-like members toclose-off the bottom side thereof and retain said hangers in a latchedrelation with respect to the associated said box-like supporting member.

16. An improved furnace roof construction for mounting on an overheadmetal framework having spaced-apart endwise-carried support beamsextending across the roof which comprises, downwardly extending tertiaryhangers mounted in a suspended relation on and along the support beams,each of said tertiary hangers having a vertical leg terminating at itslower end in a transversely extending arm, said arm terminating at itsopposite ends in a cross-extending flanged member, the flanged membersat opposite ends of said arm extending in a spaced-apart substantiallyhorizontally parallel relation with respect to each other, a secondaryhanger assembly carried by each of said flanged members and extendingtherealong, and tile-supporting primary hangers carried in rows by eachof said secondary hanger assemblies.

l7. In a handling assembly for installing refractory tile members on anoverhead support member, a pallet having a substantially planar floor,refractory tile members, each of said tile members having a pair ofopposed relatively wide side faces and a pair of opposed relativelynarrow side faces, said tile members being positioned in an uprightrelation on the floor of said pallet in the form of aligned rows inwhich each row has its tile members in a wide side face-abuttingrelation with each other, the tile members of each of said rows havingtheir narrow side faces in an aligned and abutting relation with respectto tile members of adjacent rows, banding means for retaining the tilemembers in the defined positioning on the floor of said pallet, each ofsaid tile members having an upwardly and forwardly open recess portionat its upper end that is open to one narrow side face and thatterminates in a latching portion that is forwardly-open thereto andsidewise-open to a wide side face of the tile member, a group of metalprimary hangers; each of said primary hangers having a transverseshoulder, an upwardly projecting suspending part, and a spaced-apartgroup of downwardly projecting latching leg and foot parts, and saidlatching parts of each of said hangers being adapted to be moved intolatching engagement with the latching portions of adjacent tile membersof a wide side faceabutting row by rotating each of said hangers throughsaid recess portions into said latching portions while said tile membersare being retained in position with respect to each other on saidpallet.

18. A handling assembly as defined in claim 17 wherein, each of saidtile members has a latching hole portion extending from its saidlatching portion towards a backwardly located narrow side face thereof,and a locking pin is inserted in said hole portion after one of saidhangers has been mounted in position within said latching portion forretaining the foot portion of said hanger therein.

19. In a handling assembly as defined in claim 18 wherein, said latchinghole portion extends through the backwardly located narrow side face ofeach said tile member, an extension hole portion extends from afrontwardly located narrow side face of an aligned tile member of anadjacent row in endwise-alignment with said latching hole portion toreceive an extending end portion of said locking pin therein.

20. In an improved furnace roof construction for mounting on an overheadmetal framework, refractory tile members provided with latching slotportions for suspending them, hanger castings having foot portions tolatch-engage within said latching slot portions for suspending said tilemembers in face to face aligned tile rows from the metal framework, alatching hole portion extending in an inclined plane from one of saidrefractory tile members into an endwise-aligned relation with a latchinghole portion extending in an inclined plane within an adjacent tilemember, and a locking pin positioned to extend from the latching slotportion of said one tile member along its said latching hole portioninto and along said latching hole portion of the adjacent tile memberfor securing them in an aligned relation with respect to each other.

21. An improved furnace roof construction as defined in claim 20wherein, said locking pin has an upper end portion adapted to engage thefoot portion of the hanger casting that suspends said one tile memberfor retaining said hanger casting within the latching slot of said onetile member.

22. An improved assembly of refractory tile members as defined in claim20 wherein, additional endwisealigned hole portions diagonally extendacross between and into adjacent tile members, and locking pins arepositioned to extend along the lengths of said endwisealigned holeportions for retaining said tile members in a secure relation withrespect to each other.

23. In an improved furnace roof construction as defined in claim 20, abanding strip extending about said rows of tile members for retainingthem in position with respect to each other, a skirt of refractorymaterial extending about outer side faces of the banded rows of saidtile members, insulation and mortar means filling said latching slotportions of said tile members, and a layer of grout covering upper endfaces of said tile members.

24. In an improved furnace roof construction as defined in claim 16having refractory tile members suspended by said primary hangerstherebelow to cover the roof of the furnace, means for substantiallyclosingoff an immediate area above the upper ends of the suspended tilemembers and said primary hangers to de fine an air circulating chambertherealong, an overhead manifold and vertical feed pipe means extendingtherefrom and open at its lower ends to said air circulating chamber,means associated with said overhead mani fold for supplying cooling airunder positive pressure to said chamber, a plurality of air return ductsspaced along and open to said chamber, an overhead air collectormanifold for receiving dirt-containing warmed air from said returnducts, means associated with said collector manifold for drawing thedirt-containing warmed air under negative pressure from said cham ber,and means associated with said collector manifold for separating-outdirt from the warmed air before it is discharged therefrom.

1. In an improved panelized suspended furnace roof construction formounting on an overhead metal framework having spaced-apartsubstantially horizontally extending support members, downwardlyextending post hanger members detachably suspended along the supportmembers, a cross-extending yoke member carried by a lower end portion ofeach of said post hanger members, a pair of hanger supporting memberssuspended in a horizontally extending and spaced-apart relation withrespect to each other from adjacent opposite ends of each of said yokemembers, row pairs of tilesupporting hangers removably carried by saidsupporting members, and each of said hanger supporting members extendingtransversely with respect to its associated said yoke member and havinga pair of spaced-apart latching portions therealong each of which isadapted to carry a row of said row pairs of tile-supporting hangers. 2.A furnace roof as defined in claim 1 wherein, each of said hangersupporting members comprises a box-like member whose latching portionsare latching slot portions along its opposite side walls, and said rowpairs of tile-supporting hangers are adapted to engage within saidlatching slot portions.
 3. A furnace roof as defined in claim 2 wherein,a group of cooperating tile members is suspended by said hangers in tilerows along opposite side walls of each of said box-like members.
 4. Afurnace roof as defined in claim 1 wherein, structural members aresecured to extend in a substantially right-angular relation from each ofthe opposite ends of each of said yoke members, and each of said hangersupporting members is secured to extend downwardly from an associatedone of said structural members.
 5. A furnace roof as defined in claim 4wherein, each of said hanger supporting members is a channel-shapedmember having its opposed side walls extending downwardly and having itsconnecting back wall secured to the associated one of said structuralmembers.
 6. A furnace roof as defined in claim 4 wherein, each of saidstructural members is an inverted T-shaped member having its legsuspendEd from an adjacent end portion of the associated said yokemember and having its bottom flange secured to carry an associated saidhanger supporting member.
 7. A furnace roof as defined in claim 5wherein, each said channel-shaped member has latching slot portions in aspaced-apart relation along its opposed side flanges for receiving saidtile-supporting hangers as row pairs therealong.
 8. A furnace roof asdefined in claim 4 wherein, each member of said pair of structuralmembers is of inverted T-shape, and means is provided for detachablysuspending said T-shaped members adjacent opposite ends of each of saidyoke members.
 9. A furnace roof as defined in claim 8 wherein, saiddetachable suspending means is a pair of wings carried by each endportion of each of said yoke members, and a pin extends through eachsaid pair of wings for mounting the leg of an associated one of saidpair of T-shaped members therebetween.
 10. A furnace roof as defined inclaim 8 wherein, said pair of hanger supporting members includes a pairof members of inverted U-shape, each having its connecting upper wallsecured to the bottom flange of an associated one of said T-shapedmembers, and each having latching slot portions along at least one ofits pair of spaced-apart vertical side walls to receive and carry a rowof said tile-supporting hangers therealong.
 11. A furnace roof asdefined in claim 7 wherein, a group of tile member rows is carried bysaid tile-supporting hangers along the opposed side flanges of each ofsaid channel-shaped members, and the tile members of each row are in awide face abutting relation with respect to tile members of adjacentrows.
 12. An improved furnace roof as defined in claim 7 wherein, abottom closure member is provided for each of said channel-shapedmembers that is adapated to slidably interfit with the opposed sidewalls thereof, and means for securing said bottom closure member inposition on its associated said channel-shaped member.
 13. An improvedfurnace roof as defined in claim 12 wherein, each said bottom closuremember has side portions cooperating with said latching slot portionsfor retaining said tile-supporting hangers in a latched position withinsaid slot portions.
 14. An improved furnace roof as defined in claim 7wherein, a pair of spaced-apart wing-shaped members are secured toproject downwardly adjacent opposite ends of each of said yoke members,an inverted T-shaped member has its leg removably secured between anassociated pair of said yokes, and each of said channel-shaped membershas its connected web secured to the underside of an associated saidT-shaped member.
 15. An improved furnace roof construction as defined inclaim 1 wherein, each of said hanger supporting members is ofopen-bottom box-like shape and has latching slot portions along itsopposite side walls to detachably receive said tile-supporting hangerstherein, and a closure member is adapted to interfit with each of saidbox-like members to close-off the bottom side thereof and retain saidhangers in a latched relation with respect to the associated saidbox-like supporting member.
 16. An improved furnace roof constructionfor mounting on an overhead metal framework having spaced-apartendwise-carried support beams extending across the roof which comprises,downwardly extending tertiary hangers mounted in a suspended relation onand along the support beams, each of said tertiary hangers having avertical leg terminating at its lower end in a transversely extendingarm, said arm terminating at its opposite ends in a cross-extendingflanged member, the flanged members at opposite ends of said armextending in a spaced-apart substantially horizontally parallel relationwith respect to each other, a secondary hanger assembly carried by eachof said flanged members and extending therealong, and tile-supportingprimary hangers carried in rows by each of said secondary hangerassemblies.
 17. In a handling assembly for installing Refractory tilemembers on an overhead support member, a pallet having a substantiallyplanar floor, refractory tile members, each of said tile members havinga pair of opposed relatively wide side faces and a pair of opposedrelatively narrow side faces, said tile members being positioned in anupright relation on the floor of said pallet in the form of aligned rowsin which each row has its tile members in a wide side face-abuttingrelation with each other, the tile members of each of said rows havingtheir narrow side faces in an aligned and abutting relation with respectto tile members of adjacent rows, banding means for retaining the tilemembers in the defined positioning on the floor of said pallet, each ofsaid tile members having an upwardly and forwardly open recess portionat its upper end that is open to one narrow side face and thatterminates in a latching portion that is forwardly-open thereto andsidewise-open to a wide side face of the tile member, a group of metalprimary hangers; each of said primary hangers having a transverseshoulder, an upwardly projecting suspending part, and a spaced-apartgroup of downwardly projecting latching leg and foot parts, and saidlatching parts of each of said hangers being adapted to be moved intolatching engagement with the latching portions of adjacent tile membersof a wide side face-abutting row by rotating each of said hangersthrough said recess portions into said latching portions while said tilemembers are being retained in position with respect to each other onsaid pallet.
 18. A handling assembly as defined in claim 17 wherein,each of said tile members has a latching hole portion extending from itssaid latching portion towards a backwardly located narrow side facethereof, and a locking pin is inserted in said hole portion after one ofsaid hangers has been mounted in position within said latching portionfor retaining the foot portion of said hanger therein.
 19. In a handlingassembly as defined in claim 18 wherein, said latching hole portionextends through the backwardly located narrow side face of each saidtile member, an extension hole portion extends from a frontwardlylocated narrow side face of an aligned tile member of an adjacent row inendwise-alignment with said latching hole portion to receive anextending end portion of said locking pin therein.
 20. In an improvedfurnace roof construction for mounting on an overhead metal framework,refractory tile members provided with latching slot portions forsuspending them, hanger castings having foot portions to latch-engagewithin said latching slot portions for suspending said tile members inface to face aligned tile rows from the metal framework, a latching holeportion extending in an inclined plane from one of said refractory tilemembers into an endwise-aligned relation with a latching hole portionextending in an inclined plane within an adjacent tile member, and alocking pin positioned to extend from the latching slot portion of saidone tile member along its said latching hole portion into and along saidlatching hole portion of the adjacent tile member for securing them inan aligned relation with respect to each other.
 21. An improved furnaceroof construction as defined in claim 20 wherein, said locking pin hasan upper end portion adapted to engage the foot portion of the hangercasting that suspends said one tile member for retaining said hangercasting within the latching slot of said one tile member.
 22. Animproved assembly of refractory tile members as defined in claim 20wherein, additional endwise-aligned hole portions diagonally extendacross between and into adjacent tile members, and locking pins arepositioned to extend along the lengths of said endwise-aligned holeportions for retaining said tile members in a secure relation withrespect to each other.
 23. In an improved furnace roof construction asdefined in claim 20, a banding strip extending about said rows of tilemembers for retaining them in position with Respect to each other, askirt of refractory material extending about outer side faces of thebanded rows of said tile members, insulation and mortar means fillingsaid latching slot portions of said tile members, and a layer of groutcovering upper end faces of said tile members.
 24. In an improvedfurnace roof construction as defined in claim 16 having refractory tilemembers suspended by said primary hangers therebelow to cover the roofof the furnace, means for substantially closing-off an immediate areaabove the upper ends of the suspended tile members and said primaryhangers to define an air circulating chamber therealong, an overheadmanifold and vertical feed pipe means extending therefrom and open atits lower ends to said air circulating chamber, means associated withsaid overhead manifold for supplying cooling air under positive pressureto said chamber, a plurality of air return ducts spaced along and opento said chamber, an overhead air collector manifold for receivingdirt-containing warmed air from said return ducts, means associated withsaid collector manifold for drawing the dirt-containing warmed air undernegative pressure from said chamber, and means associated with saidcollector manifold for separating-out dirt from the warmed air before itis discharged therefrom.